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2. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality .

3. Heat recovery ventilation - Wikipedia

   en.wikipedia.org/wiki/Heat_recovery_ventilation

   Diagramatic operation of a thermal wheel Ljungström Air Preheater by Swedish engineer Fredrik Ljungström (1875–1964). A thermal wheel, also known as a rotary heat exchanger, or rotary air-to-air enthalpy wheel, energy recovery wheel, or heat recovery wheel, is a type of energy recovery heat exchanger positioned within the supply and exhaust air streams of air-handling units or rooftop ...

4. Dedicated outdoor air system - Wikipedia

   en.wikipedia.org/wiki/Dedicated_outdoor_air_system

   DOAS air handling unit with heat recovery wheel and passive dehumidification. A dedicated outdoor air system (DOAS) is a type of heating, ventilation and air-conditioning system that consists of two parallel systems: a dedicated system for delivering outdoor air ventilation that handles both the latent and sensible loads of conditioning the ventilation air, and a parallel system to handle the ...

5. What not to fix when selling a home: 7 updates to skip (and ...

   www.aol.com/finance/what-not-to-fix-when-selling...

   Alternative: Instead of investing in repairs for small electrical quirks, focus on ensuring that major systems — like the HVAC, heat pump and water heater — are functioning properly. 5. Minor ...

6. Here's What to Do If Your Fireplace Pilot Light Goes ... - AOL

   www.aol.com/lifestyle/heres-fireplace-pilot...

   Related: Types of Fireplaces and the Pros and Cons of Each. What Is a Fireplace Pilot Light? If you have a gas furnace heating your home, then you may already have a good understanding of what a ...

7. Double-Height Spaces—What They Are and Why You Should Ask ...

   www.aol.com/double-height-spaces-why-ask...

   Cons of Double-Height Spaces. While there are multiple pros to double-height rooms, there are a few disadvantages as well. ... The bigger a home, the more your heating and cooling bills tend to be